Human derived extinction events

  Write a 5-6 page (or more if you'd like with references) on human derived extinction events; Highlighting the following: 1. What was the organism, what was its ecological function, and its range? * Was there a significant impact on the loss to the ecosystem with their organism gone? What filled that void? 2. What efforts, if any, are there to bring this organism back from extinction; or where there any conservation efforts before it was declared extinct? * You can pick an organism which is thought to be extinct in the wild but not in captivity if thats easier for this.